包装方式对哈密瓜跌落过程中缓冲作用的影响

Effect of Packaging on the Buffering Capacities of Hami Melon during Dropping Process

研究包装方式对哈密瓜跌落过程中缓冲作用的影响。分别采用不同层数(3、5和7层)瓦楞纸箱和不同填充物(珍珠棉、散装珍珠棉、气泡柱、瓦楞纸和气泡膜)对哈密瓜进行包装,考察其在跌落过程中,加速度最大值的变化情况。结果表明,7层瓦楞纸箱在跌落过程中,加速度最大值显著低于3层和5层的瓦楞纸箱,比3层和5层分别降低了3.6%和2.1%,缓冲能力最强,加速度最大值与瓦楞纸箱厚度和边压强度呈负相关,相关系数分别为-0.987和-0.994;在5种填充物中,散装珍珠棉的加速度最大值比珍珠棉、气泡柱、瓦楞纸和气泡膜加速度最大值分别降低了27.1%、23.2%、11.5%和3.9%,对哈密瓜的缓冲能力最强,主要原因是散装珍珠棉之间还有空隙,并且该填充物价格低廉,透气性强,利于哈密瓜呼吸产生水分的散失,适宜作为哈密瓜的长途运输的填充物。

The effect of packaging on the buffering capacities of hami melon during dropping process was evaluated. The hami melon was packaged by the 3, 5, and 7-layer corrugated carton, or filled by 5 different fillers. And the gravity acceleration of the packaged melon was measured during the dropping process. The 7-layer corrugated carton presented the lowest acceleration, 3.6% and 2.1% lower than the 3-layer and 5-layer corrugated carton, respectively. The acceleration presented the negative correlation with its thickness and edgewise compressive strength with the correlation of-0.987 and -0.994, respectively. The bulk pearl cotton presented the lowest acceleration, being of 27.1%, 23.2%, 11.5% and 3.9% lower than the EPE pearl cotton, bubble column, corrugated paper and bubble film, respectively. The strongest buffering capacity of the bulk EPE pearl cotton was caused by the porous structure. Morenver, the porous structure facilitated the air circulation of the Hami melon. Hence, the bulk EPE pearl cotton is a potential package for the Hami melon.